A continental reconstruction of hydroclimatic variability in South America during the past 2000 years

Choblet, Mathurin A.; Bühler, Janica C.; Novello, Valdir F.; Steiger, Nathan J.; Rehfeld, Kira

doi:https://doi.org/10.5194/cp-20-2117-2024

Articles | Volume 20, issue 9

https://doi.org/10.5194/cp-20-2117-2024

© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/cp-20-2117-2024

© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 20, issue 9

Research article

|

25 Sep 2024

Research article |

| 25 Sep 2024

A continental reconstruction of hydroclimatic variability in South America during the past 2000 years

Mathurin A. Choblet, Janica C. Bühler, Valdir F. Novello, Nathan J. Steiger, and Kira Rehfeld

Supplement

https://doi.org/10.5194/cp-20-2117-2024-supplement

Data sets

PaleoDA South America reconstruction Mathurin Choblet https://doi.org/10.5281/zenodo.12734422

Climate model and proxy input data for PaleoDA South America reconstruction Mathurin Choblet https://doi.org/10.5281/zenodo.12734427

Monthly climate variables of isotope-enabled climate model simulations over the last millennium (850-1849 CE) J. C. Bühler et al. https://doi.org/10.5281/zenodo.7516327

Six hundred years of South American tree rings reveal an increase in severe hydroclimatic events since mid-20th century (https://www.cr2.cl/datos-dendro-sada/) M. S. Morales et al. https://doi.org/10.1073/pnas.2002411117

Model code and software

mchoblet/paleoda_sa: Climate of the Past after revision Mathurin Choblet https://doi.org/10.5281/zenodo.13769830

xarray S. Hoyer et al. https://doi.org/10.5281/zenodo.11183201

SciTools/cartopy: v0.22.0 P. Elson et al. https://doi.org/10.5281/zenodo.8216315

A Python package for the analysis and visualization of paleoclimate data D. Khider et al. https://doi.org/10.5281/zenodo.6999279

pandas-dev/pandas: Pandas The pandas development team https://doi.org/10.5281/zenodo.3509134

numba/numba: 0.60.0 S. K. Lam et al. https://doi.org/10.5281/zenodo.11642058

Video supplement

Climate anomaly fields for South America during the Common Era Mathurin Choblet https://doi.org/10.5446/66877

South American precipitation and SASM variability during the Common Era Mathurin Choblet https://doi.org/10.5446/66879

South American precipitation and SASM variability during the Common Era (with speleothem anomalies) Mathurin Choblet https://doi.org/10.5446/66880

Short summary

Past climate reconstructions are essential for understanding climate mechanisms and drivers. Our focus is on the South American continent over the past 2000 years. We offer a new reconstruction that particularly utilizes data from speleothems, previously absent from continent-wide reconstructions. We use paleoclimate data assimilation, a reconstruction method that combines information from climate archives and climate simulations.